Lime and Phosphate Could Reduce Cadmium Uptake by Five Vegetables Commonly Grown in South China

摘要: Abstract A pot experiment was conducted in artificially Cd-contaminated (5 mg Cd kg −1 ) soils to investigate the feasibility of using lime (3 g or phosphate (80 P mitigate uptake by vegetables. Five common vegetables South China, including lettuce ( Lactuca sativa L. var. ramosa Hort.), Chinese cabbage [ Brassica rapa subsp. Chinensis (L.) parachinensis (L. H. Bailey) Hanect], broccoli oleracea albiflora Kuntze), white amaranth Amaranthus tricolor L.) and purslane viridis L.), were grown harvested after 60 d. The results showed that liming significantly reduced most 40%-50% (or a maximum 70%), mainly due immobilization soil Cd. Increased availability Ca might also contribute reduction as result absorption competition between Liming caused biomass purslane, but did not influence growth other Phosphate decreased 12%-23%. Compared with lime, decreased, smaller extent, bioavailability cases. markedly promoted Changes chemistry adding nutrient except increased content shoots suggested proper application could be effective reducing vegetables, promote well alleviate toxicity